Cement mixer and bone filler device

Patent metadata

Field	Value
Publication number	US-2016015443-A1
Application number	US-201514869254-A
Country	US
Kind code	A1
Filing date	Sep 29, 2015
Priority date	Jan 27, 2012
Publication date	Jan 21, 2016
Grant date	—

Abstract

An apparatus and method for mixing and dispensing bone cement is provided. The apparatus includes a mixing vessel for mixing bone cement attached to a syringe body. The syringe body having a lumen that is connected to the mixing vessel by a passageway between the mixing vessel and the lumen of the syringe body. A separator is provided between the mixing vessel and the syringe body and includes an orifice therein so that when the opening in the separator is misaligned with the lumen the passageway is blocked and when aligned the passageway is continuous with the lumen so that bone cement can pass into the syringe body. A plunger is provided and is slideably movable along the longitudinal axis of the syringe body so as to advance the bone cement out of the distal end of the syringe.

First claim

1 - 20 . (canceled)

21 . A bone cement mixing apparatus comprising:
a mixing vessel comprising a body defining a cavity, the body comprising opposite first and second openings that are in communication with the cavity, the mixing vessel comprising a recessed track extending into an outer surface thereof; a syringe body comprising opposite proximal and distal ends, the syringe body being attached to the mixing vessel, the syringe body comprising a lumen and opposite first and second openings that are in communication with the lumen; and a separator slidably positioned in the track, the separator comprising an orifice, the separator being configured to slide between a first position wherein the orifice substantially aligns with the openings to a second position wherein the orifice is misaligned with the openings so as to block a passageway between the mixing vessel and the lumen.

22 . An apparatus as recited in claim 21 , further comprising a plunger that extends through the openings of the mixing vessel and into the lumen.

23 . An apparatus as recited in claim 21 , further comprising a plunger that extends through the openings of the mixing vessel and into the lumen, the plunger comprising a distal end having a maximum diameter that is less than that of the lumen.

24 . An apparatus as recited in claim 21 , wherein the openings of the syringe body are concentric.

25 . An apparatus as recited in claim 21 , wherein:
the syringe body extends along a longitudinal axis between the proximal and distal ends; and the separator is configured to slide in opposite first and second directions along a transverse axis that extends perpendicular to the longitudinal axis.

26 . An apparatus as recited in claim 21 , wherein:
the syringe body extends along a longitudinal axis between the proximal and distal ends; and the orifice is coaxial with the longitudinal axis when the separator is in the first position and the orifice is offset from the longitudinal axis when the separator is in the second position.

27 . An apparatus as recited in claim 21 , wherein side surfaces of the separator engage side surfaces of the track to prevent the separator from rotating relative to the mixing vessel.

28 . An apparatus as recited in claim 21 , wherein the separator is positioned between the openings of the mixing vessel and the openings of the syringe body when the separator is in the second position.

29 . An apparatus as recited in claim 21 , wherein the orifice is round.

30 . An apparatus as recited in claim 21 , wherein the orifice has a uniform radius of curvature.

31 . A bone cement mixing apparatus comprising:
a mixing vessel comprising a body defining a cavity, the body comprising opposite first and second openings that are in communication with the cavity, the mixing vessel comprising opposite first and second flanges that extend outwardly from the body, the flanges each comprising a recessed track extending into an outer surface thereof; a syringe body comprising opposite proximal and distal ends, the syringe body being attached to the mixing vessel, the syringe body comprising a lumen and opposite first and second openings that are in communication with the lumen; and a separator slidably positioned in the tracks, the separator comprising an orifice, the separator being configured to slide between a first position wherein the orifice substantially aligns with the openings to a second position wherein the orifice is misaligned with the openings so as to block a passageway between the mixing vessel and the lumen.

32 . An apparatus as recited in claim 31 , wherein end surfaces of the separator are flush with end surfaces of the flanges when the separator is in the first position and the end surfaces of the separator are spaced apart from the end surfaces of the flanges when the separator is in the second position.

33 . An apparatus as recited in claim 31 , wherein:
the syringe body extends along a longitudinal axis between the proximal and distal ends; and the tracks extend along a transverse axis that is perpendicular to the longitudinal axis.

34 . An apparatus as recited in claim 31 , further comprising a plunger that extends through the openings of the mixing vessel and into the lumen such that the plunger is movably positioned within the lumen.

35 . An apparatus as recited in claim 31 , wherein the openings of the syringe body are concentric.

36 . An apparatus as recited in claim 31 , wherein:
the syringe body extends along a longitudinal axis between the proximal and distal ends; and the separator is configured to slide in opposite first and second directions along a transverse axis that extends perpendicular to the longitudinal axis.

37 . An apparatus as recited in claim 31 , wherein:
the syringe body extends along a longitudinal axis between the proximal and distal ends; and the orifice is coaxial with the longitudinal axis when the separator is in the first position and the orifice is offset from the longitudinal axis when the separator is in the second position.

38 . An apparatus as recited in claim 31 , wherein side surfaces of the separator engage side surfaces of the track to prevent the separator from rotating relative to the mixing vessel.

39 . An apparatus as recited in claim 31 , wherein the orifice is circular.

40 . A bone cement mixing apparatus comprising:
a mixing vessel comprising a body defining a cavity, the body comprising opposite first and second openings that are in communication with the cavity, the mixing vessel comprising opposite first and second flanges that extend outwardly from the body, the flanges each comprising a recessed track extending into an outer surface thereof; a syringe body comprising opposite proximal and distal ends, the syringe body being attached to the mixing vessel, the syringe body comprising a lumen and opposite first and second openings that are in communication with the lumen; a separator slidably positioned in the tracks, the separator comprising a circular orifice, the separator being configured to slide between a first position wherein the orifice substantially aligns with the openings to a second position wherein the orifice is misaligned with the openings so as to block a passageway between the mixing vessel and the lumen; and a plunger that extends through the openings of the mixing vessel and into the lumen such that the plunger is movably positioned within the lumen.

Assignees

• Kyphon Sarl

Inventors

• Chabansky Bruce

Classifications

• B01F13/00

  Operations & Transport · mapped topic

• A61B17/8833 Primary

  Osteosynthesis tools specially adapted for handling bone cement or fluid fillers; Means for supplying bone cement or fluid fillers to introducing tools, e.g. cartridge handling means · CPC title

• A61B17/8822

  characterised by means facilitating expulsion of fluid from the introducer, e.g. a screw pump plunger, hydraulic force transmissions, application of vibrations or a vacuum · CPC title

• A61B2017/8838

  for mixing bone cement or fluid fillers · CPC title

• A61B17/8825

  characterised by syringe details (A61B17/8822, A61B17/8827 take precedence) · CPC title